Welcome to the online resource for the identification of ticks of veterinary importance.

This site is intended for researchers and veterinary practitioners, primarily in the UK and Republic of Ireland, who wish to
identify tick specimens, or who require information on their morphology, distribution, biology and status as vectors of pathogens.

For an illustrated glossary of morphological features please click HERE.

Many of the species of tick included in this website have established populations in the UK and Republic of Ireland, but some are
known only from parts of continental Europe or Asia; they are included here because they are important vectors of pathogens and because
they are occasionally introduced, for example on travelling companion animals or migratory birds.

All the photographs and drawings are by Dr Chrissy Berry (except where otherwise stated). 

To identify a specimen, please click HERE to get started with the key.

Guide to Tick ID

From left to right, Ixodes ricinus; larva, nymph, unfed adult male, unfed adult female, fully engorged adult female (scale mm).

Guide to Tick ID

The link for each species will tell you about its:

  • Morphological features
  • Geographical distribution
  • Host
  • Life cycle
  • Pathogenesis

All photos and diagrams will enlarge when clicked. Alternatively, browse the species pages.

Please note this guide is designed for the identification of adult males and adult unfed females. It will not be of use for specimens that are fully engorged.

Nymphs to Adult Females

Nymphs and Adult females

When a specimen is obtained with a scutum that does not cover the entire dorsal surface, it is important to check the ventral surface for the presence of a genital aperture (see picture). The absence of the genital aperture will indicate that the specimen obtained is in fact a nymph and not an adult female and so this guide will not be effective at identifying the specimen.

The position of the genital aperture can vary with species, however it is generally located between either coxae IV or coxae III.